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<body>
  <div metal:define-macro="macro1">This is macro1 on sa3 line 3.
    <span metal:define-slot="slot1">This is slot1 on sa3 line 4.</span>
    This is the end of macro1 on sa3 line 5.
  </div>
  <p>Some text on sa3 line 7.</p>
  <p metal:use-macro="macro1">
    This text on sa3 line 9 will disappear.
    <b metal:fill-slot="slot1">Text from sa3 line 10 is filled into slot1.</b>
    This text on sa3 line 11 will disappear.
  </p>
  <p>This is some text on sa3 line 13.</p>
</body>
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